The Columbia root-knot nematode (CRKN), Meloidogyne chitwoodi, was first described from the Pacific Northwest region of the United States in 1980.
Distribution in North America: Mexico (Near Mexico City), USA - California, Colorado, Idaho, New Mexico, Nevada, Oregon, Texas, Utah, Washington.
What information is available
Policy directives
- D-08-04: Plant protection import requirements for plants and plant parts for planting
- D-98-01: Import Requirements for Seed Potatoes and Other Potato Propagative Material
- D-96-20: Canadian Growing Media Program, Prior Approval Process and Import Requirements for Plants Rooted in Approved Media
- D-96-05: Phytosanitary requirements for the importation and domestic movement of non-propagative potatoes (Solanum tuberosum) and related potato articles, including associated soil
- D-95-26: Phytosanitary requirements for soil and soil-related matter, and for items contaminated with soil and soil-related matter
- D-94-26: Phytosanitary import requirements for root crops (other than potato), mushrooms, and vegetables with attached roots for consumption or processing